docs(readme): Add yarn install command

[Ishaan28malik]

What: Made updates for installation using yarn.

Why: For users/developers who are using yarn as the package manager.

How: By adding the yarn add bash script.

Checklist:

• Documentation
• Tests
• Updated Type Definitions
• Ready to be merged
  

[codecov]

Codecov Report

Merging #235 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master      #235   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           20        20           
  Lines          268       268           
  Branches        65        65           
=========================================
  Hits           268       268           

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[Ishaan28malik]

@gnapse Please review

[eps1lon]

@all-contributors add @Ishaan28malik for docs

[eps1lon]

@Ishaan28malik Thanks!

[allcontributors]

@eps1lon

I've put up a pull request to add @Ishaan28malik! 🎉

[gnapse]

🎉 This PR is included in version 5.6.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀